Repair your brick wall or build new
If you already have a brick wall that's cracking or wearing, building new isn't always the answer. When the wall stands straight and only the mortar has worn, brick pointing, raking out the old joints and packing in fresh mortar, usually brings it back for far less. A wall that leans or has split top to bottom usually has a footing problem, and then I'd rather rebuild on a new footing than patch something that keeps moving.
What shapes the cost of a brick wall
Most of the cost follows the square footage of wall face, so length and height matter most. After that comes the design, since curves, steps and decorative piers take more labor than a straight run, and then the brick and cap you choose, with natural stone coping usually costing more than a brick cap. A sloped yard, tight access for materials or an old fence to tear out all add labor, and salvaged brick adds the time it takes us to check it.